Mike "The Situation" Sorrentino was allegedly doing drugs "for years."

The Jersey Shore star recently checked into an undisclosed facility for "much needed rest and recuperation" and despite his management insisting he wasn't receiving treatment for substance abuse, his former co-star Angelina Pivarnik claims he's had a long-running history with drugs.

"I don't understand how nobody caught on to him doing a mass amount of drugs! Obviously he's been using the money not for charity, and stuff like that to help kids out, to help people that are less fortunate, but using blow," she said.

Angelina says Mike should have got help for his addictions years ago and thinks he needs to spend a long time in rehab: "He's hideous! He's Popeye on crack. He deserves to freakin' stay in rehab for the next 10 years! Please stay in the rehab and don't come out! I can't believe he didn't go to rehab three years ago."